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In this paper, a EM simulation modeling method for the two dimensional time varying sea surface microwave propagation is proposed. It is not only the electromagnetic simulation model, but also is a statistical analysis model of rough sea surface channel. Firstly, PM spectrum, Fourier transformation and Creamer transformation are adoped together to build typical linear and nonlinear sea surface models...
In order to overcome the application shortcomings of the membership function in traditional AHP-fuzzy comprehensive evaluation method under multi-levels evaluation, this paper presents a new assessment method which is based on the curve characteristics of equipment performance degradation. Depending on the actual descent of the device performance when disturbed, the level of assess and the transition...
The Poisson process has been widely used in the literature to model call center arrivals. In recent years, however, there have been empirical studies suggesting the call arrival process has significant non-Poisson characteristics. In this paper, we introduce a new doubly stochastic Poisson model for call center arrivals and develop a Bayesian approach for the parameter estimation via the Markov chain...
Science and technology (S&T) is the driving force for economic development. It is significant to study the efficiency of the input-output of S&T. This paper studies the S&T input-output efficiency from 2006 to 2008 of Chinese 30 regional large and medium- sized industrial enterprises by way of DEA model. The results indicate that the efficiency is low in all and there is no improvement...
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